Media Holder with Vertical Scan Beam Adjustment
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Solution Overview
Problem
Printers face issues with media warping due to hot and humid conditions at the print zone, leading to print quality defects, especially when handling media of varying thicknesses, as existing edge holders are custom-made and not adaptable to different media types.
Innovation Solution
A media holder system that includes a central portion to hold the media on the platen, with a first end couplable to the platen and a second end couplable to a vertically movable scan beam, allowing the media holder to adapt to different media thicknesses and prevent warping by adjusting the pen-to-media distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If custom-made edge holders are used for specific media thickness, then media warping is prevented for that specific thickness, but the device cannot accommodate media of different thicknesses
Solution Approach 1:
The media holder is designed with movable components that can dynamically adjust their position and dimensions. The holder includes a first portion and a second portion that can move relative to each other, allowing the holder to adapt to different media thicknesses while maintaining its function of preventing warping. This dynamic structure enables a single holder to serve multiple media types without requiring custom-made holders for each thickness.
Solution Approach 2:
The media holder is designed as a universal component that can accommodate multiple media thicknesses and types. By integrating movable portions and adjustable mechanisms, the holder performs multiple functions: it holds media of varying thicknesses, prevents warping across different media types, and works with different scan beam positions. This eliminates the need for separate custom holders for each media specification.
2Reliability
If the scan beam is moved vertically to accommodate different media thicknesses, then media warping is prevented, but the device complexity increases
Solution Approach 1:
The vertical adjustment function is merged with the existing scan beam positioning system. The media holder's movable portions are integrated with the scan beam mechanism, allowing the same mechanical system to perform both scanning and thickness accommodation functions. This merging approach avoids adding separate complex adjustment mechanisms while still enabling adaptability to different media thicknesses.
Solution Approach 2:
The media holder is designed to self-adjust to different media thicknesses through its movable portions, which automatically position themselves according to the media thickness without requiring external intervention. The holder's structure allows it to adapt on its own as the scan beam moves vertically, reducing the need for additional control mechanisms and simplifying the overall system.
3Device complexity
If a fixed media holder is used, then the structure is simple, but it cannot adapt to varying media thicknesses and causes print quality defects
Solution Approach 1:
The media holder transitions from a fixed structure to a dynamic one with movable portions. This dynamic design allows the holder to adjust its position and shape to match different media thicknesses, ensuring consistent contact and support across various media types. The movable portions enable the holder to maintain optimal positioning for printing, preventing warping and ensuring print quality consistency while adding only minimal structural complexity.
Data Source
AI summary
An apparatus is disclosed herein. The apparatus comprises a carriage to move laterally in a scanning direction over a platen, a scan beam to support the carriage over the platen, a mechanism to move the scan beam vertically, and a media holder. The media holder comprises a central portion to hold a media on the platen, a first end couplable to the platen at a coupling position, and a second end couplable to the scan beam such that the second end moves vertically along with the scan beam.